The synergistic effect of texture and surface roughness on electrophoretic deposited bioactive glass coating

Abstract

To improve the biocompatibility of AISI 316L, bioactive glass (BG) coating of SiO2–CaO–P2O5 which helps bonding with bone implants was used by an electrophoretic deposition method. Before coating deposition, the samples were treated by shot peening, known as an efficient process for metal grain refinement and fatigue properties. The stainless steel 316L was investigated in terms of microstructure, texture, and roughness. This research covers the effects of chosen shot peening parameter on the BG‐coating properties on the obtained results. Shot peening was carried using two different sets of parameters as conventional shot peening, and severe shot peening. Wettability, roughness, microstructure, coating thickness, and corrosion behavior of coated sample were investigated in terms of potentiodynamic polarization and electrochemical impedance spectroscopy in simulated body fluid (SBF) solutions at 37°C. The results indicated that the coating thickness decreased from 35.5 ± 10 µm for coated not peened (CNP) to 20 ± 5 and 17 ± 2 µm for coated conventionally shot‐peened (CCSP) and coated severely shot‐peened (CSSP), respectively. As well as, the water contact angle of CSSP sample was equal to 15.71° which is much lower than CNP (20.7°). The protection ability of the tested samples in the SBF was improved in the following order: CCSP < CNP < CSSP.

Electrophoretic Deposition of 58S Bioactive Glass- Polymer Composite Coatings on 316L Stainless Steel: An Optimization for Corrosion, Bioactivity, and Cytocompatibility

“…Enhanced biocompatibility, fatigue resistance, and the ability to accelerate bone healing have prompted researchers and clinicians to alter the surface characteristics of metallic bioimplants. The surface properties of metallic bioimplants, e.g., SS, titanium, magnesium, and cobalt-based alloys, play a significant role in the interfacial bonding between the metal implant and surrounding human body tissues. , As the surface of an implant directly interacts with body fluids, properties such as surface bioactivity, roughness/topography, pore structure, electrical charge, wettability, crystallinity, and modulus can determine the successful integration of an implant. − When the integration of the implant surface with host tissues is suboptimal, fibrous tissue formation occurs at the interface, resulting in implant loosening and eventual failure. Technological advancements continuously strive to minimize implant failures and reduce the need for revision surgeries by enhancing biocompatibility, corrosion resistance, mechanical properties, and antimicrobial activity. ,− …”